Clabewce d



Pmna Mar. s, 1921.

illullall. I

c. D. IIISKA.

CONDENSER. APPLICATION FILED MAR. 29, 1919.

g NDR'RI PEYERS. HIC.. LIHO.. WASHINGTON. D. C

UNITED STATES CLARENCE D. TU'SKA7 0F HARTFORD. CONNECTICUT.

CONDENSER.

Application led March 2%, 1919.

l' o all w/wm it 'may concern:

Be it known that l, CLARENCE D. TUsirA, a citizen of the United States, residing at Hartford, in the county of Hartford and Sta-te of Connecticut, have invented certain new and useful improvements in Condensers, of which the ollowing is a speciiication.

This invention rela-tes to condensers. A. condenser involving the invention may be employed with utility iii various ways in the electric and allied arts, although in practice it has demonstrated particular advantage as part or the equipment of a wireless telegraph station. l have several objects in view, among the principal oi' them being the provision of an appliance oi' the character set forth, which is capable oi inexpensive production, without in any wise aifecting its proper action. The device is comparatively light, yet strong, and it can be readily and easily operated to adjust or regulate its capacity. It may be constructed in various ways. .ln the drawings accompanying and forming part oi the present specification, l have illustrated somewhat fully'iand will hereinafter describe in detail several of the many forms of the invention. This disclosure is primarily made to enable those skilled in the art to practise the invention. l am not restricted thereto. l may in fact depart there- Jfrom in several particulars within the scope of the invention deiined by the claims following said description.

Referring to said drawings- Figure 1 is a top plan view of a condenser involving the invention.

' Fig. 2 is an elevation of the same.

Fig. 3 is a transverse section of the body part 01 the condenser.

` Fig. l is a detail in sectional elevation, of the lower part of the condenser with several plies folded back and partly broken away.

Fig. 5 is a plan view of another form.

Fig. 6 is an elevation of the same.

Fig. 7 is an elevation of a further form of condenser.

Like characters refer to like parts throughout the several views which are on diiferent scales.

The condenser involves in itsl makeup at least two elements which are relatively adjustable to vary capacity. This relative adjustment, as will be inferred, may be ob- Specication of Letters :Patent Patented Mar. 8, 1921 sei-iai No. 286,190.

tained in various ways. Usually, it is accomplished by the adjustment of one of the members or elements with respect to the other, yet this may not be necessary in all cases. fit least one or both of these elements comprises a plurality of portions desirably ileXible. excellent results by makingone portion, that is the insulating` portion of some flexible material such as paper stock of which there are several kinds. l might note at this juncture that paper sheet material or thin board answers quite satisfactorily indeed. Likewise, the conducting part or p0rtion of each element may vary. Satisfactory results have been obtained by the utilisation of foil, such as tin-foil. tion or part, therefore, 'of each member or element, as I have considered the same, of the condenser is lthus flexible.

`With the foregoing observations` .l will now describe more delinitely the structure shown. and will lirst refer to the illustration made by Figs. l to 4 inclusive. There is a support or base which may also vary. That shown is denoted by 2 and is in the Jform For illustration, l have' obtained Each porof a disk of wood or other propel' substance. f

The base or support has as shown fastened to its upper surface centrally thereofA the disk 3, the screw el being shown to hold said disk to the support 2.

The body of the condenser illustrated in these four views, which I am now specifically describing, is in the form of a plurality of members of which there are two shown, being denoted respectively by 5 and 6. These members 5 and 6 are in the form of hollow cylinders or tubes, the inner tube or cylinder 6 being separated by, *for in` stance, a space 7 from the outer tube 5. Grdinarily the inner tube is rotatively adjustable to vary capacity. The outer tube 5 at its lower portion closely surrounds thel disk 3. The cylinder or tube 6 is sustained by the disk 3 and extends slightly above the cylinder 5.

The cylinders, structurally speaking and otherwise as a matter of fact, are virtually duplicates of each other so that a description of one will apply to the other. The cylinder 5 consists of an outer or envelopingl part as 8 of paper stock, and an inner part 9 01E tin-foil. While the paper stock 8 wholly incloses the tin-foil, this may not always be necessary. The paper and tin-foil are usually yadhesively united in some convenient way. It will be seen, upon reference to Fig. 3, for instance, that the width or transverse extension of the tin-foil ply or sheet 9 is approximately equa-l to one-half the circumferential extent of the tube Although the paper stock wholly covers and incloses the tin-foil, this may not always be necessary. In this particular view the two tin-foil portions are shown in exact registration or directly opposite each other, so that thereby I secure the maximum capacity of the condenser. By moving the tin-foil sheets out of register, the capacity of the condenser is reduced to zero; this capacityy may obviously be adjusted to any point from zero to the maximum, by turning the tube 6 within the tube 5.

A terminal as 10 is connected electrically with the tin-foil ply or sheet 9 of the outer tube while a somewhat similar terminal as il is similarly connected with the tin-foil ply or sheet of the inner tube 6.

To turn the inner tube 6 for regulation of capacity, any suitable means may be provided, for instance, that shown and now to be described. In the upper end of the inner tube 6-is set a head 12, for example, of wood, through which is threaded the spindle 1d having at its upper end a manipulating knob 15. By turning this knob the inner cylinder 6 may be likewise turned to adjust ca iacity.

llhe shank of a gage 16 may be fastened in some convenient way to the stationary or fixed cylinder, the Ygage portion of the gage overhanging the head 12, and there being above it and coperativc therewith the pointer 17 fastened at its butt to the spindle or screw 14, the pointer, as the spindle is turned, moving therewith and across the. grada-ations 1S of the operative portion or scale of the gage member 16.

In Figs. and 6 I show a flat construction. The base in this type is denoted by 20 and the elements or members of the active condensing portion by 21 and 22 respectively. In this kind of condenser the member 21 is practically'of half disk formation. the meniber being a complete disk. Said member 21 consists of superposed half disks 23 and 24 of paper and an interposed half disk sheet 2; of tin-foil, the tin-foil being so disposed. between the paper sheets 23 and 2d that there will be a selvage or marginal portion of paper material entirely around the tin-foil. The adjustable member 22 of disk form is Jfastened to the spindle 26 supported for turning movement by the base 2O and having a manipulating knob or linger piece 2T at its other end to facilitate its adjustment. Through the member 22 the spindle 26 tixedly extends. This member 22 consists as shown of disks 23 and 24 and an interposed half disk 25 of tin-boil.

In Fig. 7 the condenser comprises me1nbers or elements as and 31. These members or elements 30 and 81, except as to one point, to which I will later refer, are mounted and operated almost exactly like the members or elements 5 and 6 which I have set forth so fully in detail. The supporting base is denoted by 32, the element 3() being rigid with it and the element 31 being turnable in the part 30 through the agency for example of the knob These elements 30 and 31 are of tubular or hollow construction, the principal and in fact really the only difference between them and the parts 5 and 6 being that the parts 30 and 31 are of inverted frusto-conical form and are not therefore cylindrical. In all three forms of the condenser it will be seen that lthe marginal portion of the paper, or equivalent material, overlies the foil so as to leave margin or selvage of paper.

That I claim is: Y

l. .t condenser comprising a plurality of coaxial relatively turnably adjustable elements each element being flexible and having insulating and conducting sections.

2. A condenser comprising relatively adjustable elements, each flexible and having insulating and conducting sections the in sulating sections wholly inclosing the conducting sections.

3. A condenser comprising coaxial relatively adjustable elements, each flexible and having insulating and conducting sections, the respective conducting sections being wholly inclosed in the insulating sections and the marginal portions of the respective insulating sections extending outward beyond the marginal portions of the conducting sections.

si. A condenser comprising coaxial relatively turnably adjustable elements. each ci paper stock and metal foil.

5. A condenser comprising elements each of paper stock and metal foil and relatively adjustable to vary the capacity of the coridenser.

6. condenser comprising elements each of sheet paper stock and metal foil and relatively adjustable to vary the capacity of the condenser. i l

T. A condenser comprising tubular elements, one inclosed by another and each of paper stock and metal foil.

8.1i condenser comprising tubular coaxial elements each of paper and foil and relatively adjustable about their common axis.

9. A condenser ycomprising tubular elements. one inclosed by another and of paper stock and metal, the paper stock inclosing the metal foil and the marginal portions thereof extending outward beyond the marginal portions of the foil. the elements being relatively adjustable about their common aXis t0 vary the capacity of the condenser.

10. A condenser comprising spaced c0- aXial tubular elements, one nclosed by another, each of sheet paper and tin foil, the sheet paper Wholly inclosing the tin foil and each of the paper portions of the elements extending outward beyond the marginal portions of the tin foil, the elements being relatively adjustable about their comY mon axis to vary the capacity of the condenser.

In testimony whereof I aiX my signature in the presence of two Witnesses.

CLARENCE D. TUSK Witnesses:

LYDIA MATHER, FREDERICK L. CLARK. 

